Pick out the correct statement about the condensation.
Filmwise condensation gives a lower heat transfer rate than the dropwise condensation
Suitable coating or vapour additive is used to promote film wise condensation
If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it
Reynolds number of condensing liquid is based on its mass flow rate
- Minimum thermal efficiency of a steam boiler may be around __________ percent
- Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles…
- The most economical channel section for the fluid flow is the one for which the discharge is maximum…
- In practice, the compression ratio of compression-ignition (CI) engine ranges from
- LVDT used for displacement measurement is a/an __________ transducer.
- The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature…
- Unit of viscosity in CGS system is
- Wavelength of radiation emitted by a body depends on the __________ of its surface.
- Hooke's law
- Electrometallurgy is not involved in the extraction of __________ from its ore.
- Closeness of packing is maximum in case of __________ crystal lattice.
- Saturated steam at a pressure of 25 kg/cm2 is throttled to attain 5 kg/cm2. Then the outcoming steam…
- Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare…
- Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.
- The following thermocouple may be used for measuring temperature upto 1873°K.
- Plastics as a material of construction suffer from the drawback of low
- Factor of safety is the ratio of the __________ stress to the working stress.
- For an ideal gas, Cp - Cv is
- Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles…
- Projection welding & stud welding is categorised as the __________ welding.
- Air intake for an air compressor should be preferably taken from
- Thermodynamic cycle involved in the working of a thermal power plant is the __________ cycle.
- Silicon crystal can be converted to p-type semiconductor by doping with
- The concentration of (H+) ions is 4 x 10-5 in a solution. Then pH of the solution will be (Given log…
- Which of the following represents the correct time-temperature curve when a block of metal is heated…
- X-rays are
- Austempering process results in the formation of __________ structure.
- Gage pressure within a spherical droplet of a fluid is 'p'. What will be gage pressure within a bubble…
- Joule-Thomson co-efficient is the ratio of
- Rankine cycle comprises of two isothermal and two __________ processes.